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Inventor
senior researcher à principal researcher, Tae-gyu Jung
Team
Department of launch vehicle propulsion control
Status of right
• US : 9092032
• JP : 4870799
Title
• FLOW CONTROL VALVE
• FLOW CONTROL VALVE
03
Korea Aerospace Research Institute Promising Technologies for Commercialization
Outline of Technology
TLO of the KARI
Person-in-charge
Senior Administrator Moon-Hee, Cho
E-mail : moonyxp@kari.re.kr
R&D Performance Diffusion Division
Flow control
valve
The technique can control a flow of a desired
fluid as necessary, and control an amount of flow
to be maintained constant at all times regardless
of abrupt system load changes.
Technique for not only adjusting flowrate but
also maintaining a constant flowrate regardless of
system load changes
Manufacturing a prototype of ultralight pressure-
compensating control valve by applying the flow
control technique
<Schematic view of flow control valve>
<Prototype of an ultralight
pressure-compensating flow control valve>
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production of confirmed parts/system and prototype
Technical Readiness Level
TRL 1
TRL 2
TRL 3
TRL 5
TRL 6
TRL 7
TRL 8
TRL 9
TRL 4
Distinctiveness
• Even when a system load of a flow control valve is abruptly changed, an amount of flow is always
constantly maintained, and a weight and size of the valve is reduced to about a tenth that of the
conventional technique.
Technical effects
• Simple constitutions, easy control, less frequent malfunctions
Technical features and advantages
Industrial
control
valve of
Korea(31kg)
Flow control
valve(3kg)
Technical detail
A prototype is manufactured based on this technique, and a modified technology
is under development for improving manufacturing efficiency.
• While many conventional researches were conducted on using a mechanical feedback structure
(mechanical compensation mechanism) to absorb a change in flow to maintain a constant amount
of flow at all times, no technique has been found so far in which a simple constitution of an
actuator reduces a weight and maintains a constant flow even when a pressure abruptly changes
as disclosed in the subject technique.
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Technical detail
Flow control valve
• Reduction of a driving force of an actuator leads to its
size reduction, and therefore the entire valve is reduced in
weight. Furthermore, an abrupt pressure change occurring
at an inlet or outlet of the valve is absorbed by a mechanical
feedback structure (compensation mechanism) so that it is
possible to maintain a constant flow.
Actuator
A flow control valve precisely
controls an amount of liquid while
ensuring a constant flow regardless
of changes in system loads
Flow control valve
1. Precise flow control
2-1. Valve parallel to a flow path àResistance
pressure, operational torque
2-2. Miniature valve can be manufactured
2. Miniaturization/ electronic control
3. Maintaining of suitable flow
• The global market of industrial valves and actuators was
28.1 trillion won in 2015, and is expected to reach 40.6
trillion won in 2021. A market of specific valves will reach
about 4 trillion won, which is a tenth of the global market.
• The market of specific valves is monopolized by a few
companies in the United States, Europe, and Japan.
Classification
Reference
Estimation
2015
2016
2017
2018
2019
2020
2021
Marker
(Unit
hundred
millionwon)
Size
238,448
252,667
267,981
283,294
299,701
317,202
335,796
Growth
rate
5.87%
5.87%
5.87%
5.87%
5.87%
5.87%
5.87%
Market and future prospect
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Applications
• Applicable to various fields of industrial valves such as marine shipbuilding, aviation, plants,
construction, mechanics, etc.
Industrial
control
valve of
Korea(31kg)
Flow control
valve(3kg)
Replacement of previously installed product
Flow control valve
Performance
enhancement
A market size of 28
tnillion won
(as of 2015)